Physics Homework Aid

Physics holds significant importance among the natural sciences, elucidating life's wonders and ranking among the most challenging subjects to master.

QuestionAI is a rich and user-friendly physics problem solver for novice physicists, enabling exploration of atomic properties and interactions, alongside molecular trajectories under various forces. Furthermore, you can delve into the mysteries concealed amidst galaxies with fellow physics enthusiasts. Boldly pose your conjectures and queries to the AI, and authoritative answers will readily emerge.

A small ball, P.of mass 0.8kg, is held at rest on a smooth horizontal table and is attached to one end of a thin rope. The rope passes over a pulley that is fixed at the edge of the table. The other end of the rope is attached to another small ball , Q, of mass 0.6kg , that hangs freely below the pulley. Ball P is released from rest, with the rope taut, with P at a distance of 1.5 m from the pulley and with Q at a height of 0.4m above the horizontal floor, as shown in Figure 1. Ball Q descends, hits the floor and does not rebound. The balls are modelled as particles, the rope as a light and inextensible string and the pulley as small and smooth. Using this model, (a) show that the acceleration of Q, as it falls, is 4.2ms^-2 (5) (b) find the time taken by P to hit the pulley from the instant when P is released. (6) (c) State one limitation of the model that will affect the accuracy of your answer to part (a). (1) Total (12 marks)

An apple is resting on a table . Claire says that there are no forces acting on the a pple becaus e it is n of moving . Is she right? yes

Question 27 of 30 If you went to Mars, where the force of gravity is weaker than on Earth, would you expect your mass to increase decrease or stay the same? decrease increase stay the same

Calculate the force applied (in newtons) if a pressure of 10Pa is acting on an area of 0.5m^2 Enter your answer as a number

A force of 1000N is applied to a surface. It creates a pressure of 2000Pa. Calculate the area of the surface. Enter your answer as a number m^2